Table 2.
Characteristics of sample used to examine objective sleepiness using the Multiple Sleep Latency Test (n=1846)
| Characteristic | Females (n=814 MSLT studies) |
Males (n=1032 MSLT studies) |
All | ||
|---|---|---|---|---|---|
| AHI < 15 | AHI ≥15 or CPAP |
AHI < 15 | AHI ≥15 or CPAP |
||
| Sample size | 735 | 79 | 836 | 196 | 1846 |
| Age (years) mean(range) | 51 (31–73) | 54 (35–68) | 52 (31–72) | 55 (33–71) | 52 (31–73) |
| Body Mass Index (Kg/m2) | 31 (7) | 42 (9) | 29 (5) | 35 (7) | 31 (7) |
| MSLT (mins) | 11 (5) | 10 (6) | 9 (5) | 9 (5) | 10 (5) |
| MSLT ≤5 mins, n (%) | 109 (15) | 19 (24) | 181 (22) | 53 (27) | 362 (20) |
| Habitual sleep time (hours) | 7 (1) | 7 (1) | 7(1) | 7 (1) | 7 (1) |
| Nap per week (hours) | 1 (3) | 2 (3) | 2 (2) | 2 (3) | 2 (3) |
| Depression*, n (%) | 217 (30) | 27 (35) | 142 (17) | 38 (20) | 424 (23) |
| Comorbid conditions, n (%) | 30 (4) | 4 (5) | 58 (7) | 30 (15) | 122 (7) |
| Stroke, n (%) | 9 (1) | 2 (3) | 1 (0.1) | 7 (4) | 19 (2) |
| Heart Failure, n (%) | 5 (1) | 0 (0) | 4 (0.5) | 2 (1) | 11 (1) |
| Cardiovascular disease**, n (%) | 19 (3) | 3 (4) | 55 (7) | 23 (12) | 100 (5) |
| Current Smoker, n (%) | 108 (15) | 6 (8) | 134 (16) | 26 (16) | 274 (15) |
| Alcoholic drinks per week, median (range) | 1 (0–36) | 0 (0–14) | 2 (0–98) | 2 (0–29) | 2 (0–98) |
| Caffeinated drinks per day, mean (sd) | 3 (2) | 2 (2) | 3 (3) | 4 (3) | 3 (3) |
| CPAP use, n (%) | NA | 26 (33) | NA | 54 (28) | 80 (4) |
These data are reported on number of sleep studies, with most subjects contributing multiple studies. Variables are reported as mean (sd) unless otherwise stated.
*
Defined as using antidepressant medication or ZUNG depression scale ≥ 50
**
Heart attack, coronary artery disease, or cardiovascular surgical procedure